FORTUNE -- The chart at right represents the worst case scenario for Apple's (AAPL) share of the global smartphone market, as forecast Monday by Sanford Bernstein's Toni Sacconaghi.
Using Apple's own numbers for fiscal Q2, Sacconaghi calculates that iPhone sales grew 7% year over year in a sell-in basis (12% in a sell-through basis) while the overall smartphone market grew by about 36%. The net result is that Apple's share of the global smartphone market fell from 23% last year to 17% share this year -- the largest year-over-year decline in the iPhone's history, according to Sacconaghi.
The situation won't get any better by June, he figures. Based on Apple's fiscal Q3 revenue guidance, he estimates Apple will sell about 25 million iPhones in the current quarter (down 4% year over year). If the overall market grows 30%, Apple's share will fall to 12.3%. If it grows 36%, Apple's share falls to 11.7%.
"Perhaps most startlingly," he writes, "if Apple does not introduce a new iPhone or lower-priced phone in CQ3 [Apple's fiscal Q4], it is quite possible that iPhone's smartphone market share could drop into the single digits."
Given this dire prospect, how can Sacconaghi maintain a $600 price target for Apple and an Outperform rating? He offers several "perspectives." Quoting from his note to clients:
Bernstein's Apple analyst says investors are expecting the equivalent of a 4.5% yield.
FORTUNE -- According to Bernstein Research's Toni Sacconaghi, Apple's (AAPL) top brass has been holding "widespread discussions" with key investors to get input on its plans to return more of its $137.1 billion cash hoard to shareholders.
Sacconaghi has been debriefing those investors and now thinks he has a pretty good idea of how Apple's cash management plans have MORE
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Over the past 8 quarters, it beat its EPS estimate by 42%, revenue by 18%
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And re-sold it to consumers for billions more than it paid, according to Toni Sacconaghi
The only difference between a 16 GB iPhone 4S and the 32 GB model is 16 GB of NAND flash memory, for which Apple (AAPL) charges customers $100.
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Philip Elmer-DeWitt - Jan 6, 2012 11:39 AM ET
Bernstein's top Apple analyst joins the chorus questioning the stock's dismal valuation
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In the first of a two-part series, Bernstein's Toni Sacconaghi on Monday drilled a little deeper into that -2% growth rate and found a series of what he calls "fantastically MORE
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CapEx spending is up 9 fold in 3 years, the bulk on equipment for a few key suppliers
When Apple (AAPL) reports an uptick in its cash and marketable securities holdings -- up $5.4 billion to $81.6 billion last quarter -- Bernstein's Toni Sacconaghi can usually be counted on to call for the company to return some of that cash to the shareholders (70% of whom happen to be institutions like MORE
Philip Elmer-DeWitt - Nov 15, 2011 8:12 AM ET
An analyst imagines everything it might be when -- and if -- it opens this spring
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An analyst offers four reasons nobody has managed to match Apple's iPad
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Philip Elmer-DeWitt - Mar 2, 2011 11:22 AM ET
An analyst asks whether it can keep outperforming the market without paying a dividend
Toni Sacconaghi just won't give up.
For more than two years, Bernstein Research's top Apple (AAPL) analyst been after Steve Jobs to spend some of the company's growing cash hoard ($51 billion as of September), preferably on a stock buyback or cash dividend.
"Shareholder frustration," he wrote in an open letter to the board of directors in August, "is MORE
Philip Elmer-DeWitt - Dec 8, 2010 11:54 AM ET
He will ignore the latest call for Apple to share its huge cash hoard as he ignores them all
Most of the arguments for and against the open letter to Apple's (AAPL) board of directors issued Thursday by Bernstein Research's Toni Sacconaghi have already been made. (See here and here.)
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Philip Elmer-DeWitt - Aug 13, 2010 8:48 AM ET